Alleviating the Collision States and Fleet Optimization by Introducing a New Generation of Automated Guided Vehicle Systems

Table 1

Summary of AGV dispatching rules.

Vehicle initiated	Workstation initiated
First-come-first-served (FCFS)	Farthest vehicle (FV)
First-encountered-first-served (FEFS)	First available vehicle (FAFS)
Largest queue size (LQS)	Least cumulative idle time (LIT)
Longest interarrival time (LIT)	Least utilized vehicle (LUV)
Longest travel time (LTT)	Longest idle vehicle (LIV)
Longest waiting time (LWT)	Most cumulative idle vehicle (MIT)
Maximum demand (MD)	Nearest (Idle) vehicle (NV or NIV)
Maximum outgoing queue size (MOQS)	Random vehicle (RV)
Minimum remaining outgoing queue (MROQS)
Minimum work-in-queue (MWQ)
Modified first-come-first-served(MFCFS)
Random workstation (RW)
Shortest time to travel first (STTF)
Unit load shop arrival time (ULSAT)
Vehicle looks for work (VLFW)